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Title: Electrostatic Discharging Techniques For Polyethylene Pipe
Author: Oren Tranbarger, Michael m. Mamoun
Source: American Gas Association 1991
Year Published: 1991
Abstract: Internal and external spark discharges from the surfaces of polyethylene (PE) gas pipe may ignite flammable gas-air mixtures during leak repairs. The wet soapy burlap wrap technique presently used in the gas industry for controlling exterior charge has several disadvantages and does not dissipate interior charge. Successful discharging techniques have been demonstrated for both problems. For exterior charge, a dry sparkless antistatic PE-film wrap overcomes the disadvantages of wet burlap wrap. Interior charge is neutrahzed by injecting an antistatic spray inside the pipe through a self-tapping fitting. NOTE: Two Gas Research Institute (GRI) patents are pending on: (1) the application of antistatic PE-film wrap forexterior discharging and (2) the discharger device for neutralizing interior charge that are described in this paper.

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